Class: OpenapiFirst::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/openapi_first/builder.rb

Overview

Builds parts of a Definition This knows how to read a resolved OpenAPI document and build Request and Response objects.

Constant Summary collapse

REQUEST_METHODS =

rubocop:disable Metrics/ClassLength

%w[get head post put patch delete trace options query].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(contents, filepath:, config:) ⇒ Builder

Returns a new instance of Builder.



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# File 'lib/openapi_first/builder.rb', line 26

def initialize(contents, filepath:, config:)
  meta_schema = detect_meta_schema(contents, filepath)
  @schemer_configuration = build_schemer_config(filepath:, meta_schema:)
  @config = config
  @file_loader = FileLoader.new
  ref_resolver = RefResolver.new(file_loader:)
  @contents = ref_resolver.for(contents, filepath:)
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/openapi_first/builder.rb', line 35

def config
  @config
end

Class Method Details

.build_router(contents, filepath:, config:) ⇒ Object

Builds a router from a resolved OpenAPI document.

Parameters:



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# File 'lib/openapi_first/builder.rb', line 22

def self.build_router(contents, filepath:, config:)
  new(contents, filepath:, config:).router
end

Instance Method Details

#build_parameter_schema(parameters) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 118

def build_parameter_schema(parameters)
  return unless parameters

  required = []
  schemas = parameters.each_with_object({}) do |parameter, result|
    schema = parameter['schema'].schema(configuration: schemer_configuration)
    name = parameter['name']&.value
    required << name if parameter['required']&.value
    result[name] = schema if schema
  end

  Schema::Hash.new(schemas, required:, configuration: schemer_configuration,
                            after_property_validation: config.after_request_parameter_property_validation)
end

#build_requests(path:, request_method:, operation_object:, parameters:) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 133

def build_requests(path:, request_method:, operation_object:, parameters:)
  content_objects = operation_object.dig('requestBody', 'content')
  if content_objects.nil?
    return [
      request_without_body(path:, request_method:, parameters:, operation_object:)
    ]
  end
  required_body = operation_object['requestBody']&.resolved&.fetch('required', false) == true
  content_objects.map do |content_type, content_object|
    content_schema = content_object['schema'].schema(
      configuration: schemer_configuration,
      after_property_validation: config.after_request_body_property_validation
    )
    Request.new(path:, request_method:, parameters:,
                operation_object: operation_object.resolved,
                content_type:,
                content_schema:,
                required_body:,
                key: [path, request_method, content_type].join(':'))
  end
end

#build_response_headers(headers_object) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 187

def build_response_headers(headers_object)
  return if headers_object.nil?

  result = []
  headers_object.each do |name, header|
    next if header['schema'].nil?
    next if IGNORED_HEADER_PARAMETERS.include?(name)

    header = Header.new(
      name:,
      schema: header['schema'].schema(configuration: schemer_configuration),
      required?: header['required']&.value == true,
      node: header
    )
    result << header
  end
  result
end

#build_responses(responses:, request:) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 164

def build_responses(responses:, request:)
  return [] unless responses

  responses.flat_map do |status, response_object|
    headers = build_response_headers(response_object['headers'])
    response_object['content']&.map do |content_type, content_object|
      content_schema = content_object['schema'].schema(
        configuration: schemer_configuration,
        after_property_validation: config.after_response_body_property_validation
      )
      Response.new(status:,
                   headers:,
                   content_type:,
                   content_schema:,
                   key: [request.key, status, content_type].join(':'))
    end || Response.new(status:, headers:, content_type: nil,
                        content_schema: nil, key: [request.key, status, nil].join(':'))
  end
end

#build_schemer_config(filepath:, meta_schema:) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 38

def build_schemer_config(filepath:, meta_schema:)
  result = JSONSchemer.configuration.clone
  dir = (filepath && File.absolute_path(File.dirname(filepath))) || Dir.pwd
  result.base_uri = URI::File.build({ path: "#{dir}/" })
  result.ref_resolver = JSONSchemer::CachedResolver.new do |uri|
    file_loader.load(uri.path)
  end
  result.meta_schema = meta_schema
  result.insert_property_defaults = true
  result
end

#detect_meta_schema(document, filepath) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 50

def detect_meta_schema(document, filepath)
  # Copied from JSONSchemer 🙇🏻‍♂️
  version = document['openapi']
  case version
  when /\A3\.1\.\d+\z/
    document.fetch('jsonSchemaDialect') { JSONSchemer::OpenAPI31::BASE_URI.to_s }
  when /\A3\.0\.\d+\z/
    JSONSchemer::OpenAPI30::BASE_URI.to_s
  else
    raise Error, "Unsupported OpenAPI version #{version.inspect} #{filepath}"
  end
end

#group_parameters(parameter_definitions) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 206

def group_parameters(parameter_definitions)
  result = {}
  parameter_definitions&.each do |parameter|
    (result[parameter['in']&.value&.to_sym] ||= []) << parameter
  end
  result[:header]&.reject! { IGNORED_HEADER_PARAMETERS.include?(_1['name']&.value) }
  result
end

#parse_parameters(parameters) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 96

def parse_parameters(parameters)
  grouped_parameters = group_parameters(parameters)
  ParsedParameters.new(
    query: resolve_parameters(grouped_parameters[:query]),
    path: resolve_parameters(grouped_parameters[:path]),
    cookie: resolve_parameters(grouped_parameters[:cookie]),
    header: resolve_parameters(grouped_parameters[:header]),
    query_schema: build_parameter_schema(grouped_parameters[:query]),
    path_schema: build_parameter_schema(grouped_parameters[:path]),
    cookie_schema: build_parameter_schema(grouped_parameters[:cookie]),
    header_schema: build_parameter_schema(grouped_parameters[:header])
  )
end

#request_without_body(path:, request_method:, parameters:, operation_object:) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 155

def request_without_body(path:, request_method:, parameters:, operation_object:)
  Request.new(path:, request_method:, parameters:,
              operation_object: operation_object.resolved,
              content_type: nil,
              content_schema: nil,
              required_body: false,
              key: [path, request_method, nil].join(':'))
end

#resolve_parameters(parameters) ⇒ Object 



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# File 'lib/openapi_first/builder.rb', line 110

def resolve_parameters(parameters)
  parameters&.map do |parameter|
    result = parameter.resolved
    result['schema'] = parameter['schema'].resolved
    result
  end.to_a
end

#router ⇒ Object

rubocop:disable Metrics/MethodLength



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# File 'lib/openapi_first/builder.rb', line 63

def router # rubocop:disable Metrics/MethodLength
  router = OpenapiFirst::Router.new
  @contents.fetch('paths').each do |path, path_item_object|
    path_parameters = path_item_object['parameters'] || []
    path_item_object.resolved.keys.intersection(REQUEST_METHODS).map do |request_method|
      operation_object = path_item_object[request_method]
      operation_parameters = operation_object['parameters'] || []
      parameters = parse_parameters(operation_parameters.chain(path_parameters))

      build_requests(path:, request_method:, operation_object:,
                     parameters:).each do |request|
        router.add_request(
          request,
          request_method:,
          path:,
          content_type: request.content_type,
          allow_empty_content: request.allow_empty_content?
        )
        build_responses(request:, responses: operation_object['responses']).each do |response|
          router.add_response(
            response,
            request_method:,
            path:,
            status: response.status,
            response_content_type: response.content_type
          )
        end
      end
    end
  end
  router
end